Evidence for B(*)s barB(*)s Production at the Upsilon(5S)
Abstract
Using data collected by the CLEO III detector at CESR, we started a series of investigations on the Upsilon(5S) resonance decay properties. The data sample used for this analysis consists of 0.42 fb-1 of data taken on the Upsilon(5S) resonance, 6.34 fb-1 of data collected on the Upsilon(4S) and 2.32 fb-1 of data taken in the continuum below the Upsilon(4S). Bs mesons are expected to decay predominantly into Ds meson, while the lighter B mesons decay into Ds only about 10% of the time. We exploit this difference to make a preliminary model dependent estimate of the ratio of Bs(*) anti-Bs(*) to the total b anti-b quark pair production at the Upsilon(5S) energy to be (21 +- 3 +- 9)%.
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